Watchcase tool



Oct. 8,1946. L. A. YCORMIER 2,408,737

WATCHCASE TOOL Filed March 27, 1945 IN VEN TOR.

[ow/Ls" (brmier Patented Oct. 8, 1Q46 NI D STAT vvA'roHoAsE TOOL Louis A. Cormier, West Hempstead, N.'Y., assignor to Hammel, Riglander & 'Co. Inc., New York, N. Y., a corporation o ;New York Application March 27, 1945, Serial No. 585,057

2 Claims.

This invention relates to watch case tools, and more particularly to tools of the character adapted for removing thread-on backs of the watch cases.

Watch case backs of the so-called thread-on type, widely employed at the present time upon waterproof wrist watches, are often difiicult to remove, While recesses are provided in the backs of watch cases of this type for engagement by a suitable implement or tool to enable the back to be unthreaded, the backs are often so firmly screwed home that it is diflicult to secure sufficient purchase on the back of the case to impart an unthreading movement of enough force to loosen the back of the case and start it upon its unthreading movement. Moreover, the use of makeshift tools or implements with which to engage the recesses in the back of the case, often 7 results in slippage of such tools from the recesses and in defacements and scratches across the back of the watch case. v

The present invention therefore contemplates the provision of a simple and efficient tool, resembling a pair of pliers in appearance, by which a plurality of spaced apertures, recesses or notches formed in a watch case back, may be securely engaged, and by rotation of the tool about its longitudinal axis, the most firmly attached watch case back may be loosened and quickly unthreaded.

An object of the invention is to provide a tool of this character having a pair of pivotally connected handle parts formed with jaws so disposed and shaped that the extremities of the same will engage with a pair of recesses or notches formed in the back of the watch case, and rotation of the tool will loosen the watch case back and Permit it to be unthreaded.

Another object of the invention is to provide a tool of this kind so designed that it will be adapted for use on watch case backs of various kinds and designs, thus constituting a handy and useful tool for the watch repair man.

In the accompanying drawing, wherein an illustrativ embodiment of the invention is disclosed, Fig. 1 is a face view of the improved tool in slightly open position; Fig. 2 is a similar, slightly enlarged view, of the jaw portion of the tool, showing how the same engages the recesses in the back of a watch case; Fig. 3 is an edge View of the jaw portion of the tool; Fig. 4 is a perspective view of one of the tips or extremities of the jaws, and Fig. 5 shows the back of a wrist watch case, showing the apertures or recesses engaged by the tool.

The improved tool generally resembles a pair of pliers and is thus provided with the two handle parts I and 2 of similar shape. That part indicated at l is provided with the enlarged hub portion 4, while the handle part 2 is formed with the hub part 3, the parts 3 and 4 fitting together in the manner common to plier construction, and being pivotally joined by the conventional pivot pin 5.

Extending from the hub portion 4 is a jaw 6 which gradually tapers toward its free end or extremity and adjacent to its extremity its opposite side faces 1 are flattened and converge toward the tip 8 which is flattened and substantially square in outline. The inside surface of the end portion of the jaw is curved or concaved slightly to form a relatively slight hook as indicated at 9 in Figs. 1 and 2, this conformation of the end portions of the jaws helping to maintain the ends of the same in positive engagement with the recesses or notches provided in the watch case back. A slight notch or groove, as indicated at l3 in Fig. 4, might also be provided at the end of the jaw, to facilitate engagement of the jaw with certain types of recesses provided in the back of the watch case.

The hub 3 has a jaw 6a similar to that described and carried by the hub 4. In Fig. 5 is shown a watch case l0 having a so-called threadon back II. The back H is shown as provided with three spaced recesses [2, provided for the purpose of facilitating the unthreading movement of the back. To remove the back by the use of the improved tool, the watch case is placed flatwisely upon a suitable surface, or in a suitable vise or gripping means, and the ends 8 of the jaws of the tool are inserted in any two of the recesses, as shown in Fig. 2. The shape of the ends or extremities 8 of the jaws is such that the same firmly engage with the recesses l2. The handles 1 and 2 are held in the hand and the tool is rotated about its longitudinal axis in a direction to unthread the watch case back. The most firmly attached back will be loosened and unthreaded without difficulty.

In some watch cases, the recesses in the back are of different form from those shown at [2. The shape and arrangement of the ends of the jaws of the tools are however, of such form that these ends readily engage any of the different types of recesses, notches and other depressions provided in the backs of watches of various styles and types. Since the jaws of the toolare pivotally connected and can be brought together or spread apart to any extent within the limits of the tool, the tool can be readily adapted for use with watches of various sizes and will speedily loosen and unthread the most tightly attached watch case back.

What I claim is:

1. A tool for removing thread-on backs of watch cases comprising, a pair of pliers having jaws tapered "and inturned toward'one another and shaped at their ends to enable the same to be engaged in a pair of spaced recesses in the back of a watch case and the tool rotated to thereby unthread the back of the Watch case, the ends of the jaws being of rectangular form and being notched in the sides which face toward one another. 

